The Nationalist Chinese were simply incompetent. They had plenty of materiel to fight with, it was just that they were lousy at fighting, and especially at inspiring troops. And they were facing far superior leadership in every way.
The Cold War started during WWII by Stalin. The Chinese Nationalists were about to crush the Reds in ‘46 but the US wouldn’t let them finish the job. The Reds were allowed to recover and the rest is history.
Of course not, the Reds had infiltrated the government big time by then.